US20150209820A1 - Glue gun - Google Patents

Glue gun Download PDF

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Publication number
US20150209820A1
US20150209820A1 US14/687,818 US201514687818A US2015209820A1 US 20150209820 A1 US20150209820 A1 US 20150209820A1 US 201514687818 A US201514687818 A US 201514687818A US 2015209820 A1 US2015209820 A1 US 2015209820A1
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US
United States
Prior art keywords
hot melt
melt adhesive
passage
glue gun
passages
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/687,818
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English (en)
Inventor
Kazuhiko Ono
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technos Co Ltd
Original Assignee
Technos Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technos Co Ltd filed Critical Technos Co Ltd
Assigned to TECHNOS CO., LTD. reassignment TECHNOS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ONO, KAZUHIKO
Publication of US20150209820A1 publication Critical patent/US20150209820A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/001—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work incorporating means for heating or cooling the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00523—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material
    • B05C17/00526—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application
    • B05C17/0053—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application the driving means for the material being manual, mechanical or electrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1042—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/0052—Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00523—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material
    • B05C17/00546—Details of the heating means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/012—Heaters using non- flexible resistive rods or tubes not provided for in H05B3/42

Definitions

  • the present invention relates to a glue gun that heats and melts a stick-shaped hot melt adhesive, and injects the hot melt adhesive.
  • a hot melt adhesive (hot glue) is used as an adhesive for closing (sealing) a corrugated paperboard carton, for packaging a medicine or cosmetics, for assembling a woodwork, and for other purposes.
  • the hot melt adhesive is an adhesive that may include ethylene-vinyl acetate (EVA), or thermoplastic resin such as polyamide and acrylic resin.
  • EVA ethylene-vinyl acetate
  • thermoplastic resin such as polyamide and acrylic resin.
  • an application device which is referred to as a hot melt applicator, is usually used.
  • the hot melt adhesive is melted in a tank having a capacity of from several liters to several tens liters. The melted adhesive is pumped up such that the melted adhesive moves through parts, such as a heater hose and an automatic gun, and is applied.
  • the adhesive application device is a tool having a simple (handy) and portable structure.
  • a glue gun As disclosed in Patent Literatures 1 to 3 (will be mentioned below), for example, the glue gun uses a hot melt adhesive, which is formed in a solid cylindrical stick shape beforehand. This stick is often referred to as a glue stick.
  • the glue stick is pushed into a metallic passage, which has an associated built-in heater. The glue stick is heated to a hundred and several tens degrees C. and melted in the passage. Then, the melted (molten) glue is injected from a nozzle (outlet) at an end of the passage by a desired amount at each injection such that the melted glue is applied to a target area.
  • the above-mentioned hot melt applicator requires a power source and a compressed air (air compressor), and therefore the hot melt applicator is extremely difficult to move from one place to another place. Also, the hot melt applicator is expensive.
  • the glue gun is hand-held (hand carry) tool, which is similar to an electric drill and a soldering iron. Because the glue gun does not make user's hands sticky, and enables quick bonding, the glue gun is conventionally used for handcrafts. As the usability, the workability, and the inexpensive cost are recognized, use of the glue gun rapidly expands in the industrial use. For example, the glue gun is most suitable for packaging a small volume of different kinds of goods. Recently, the glue gun is more used as a tool to bond and fix automobile parts and electric parts.
  • the hot melt adhesive is made from a resin (thermoplastic resin) having a low thermal conductivity.
  • the hot melt adhesive is not melted quickly even if the hot melt adhesive is heated by a heater.
  • the hot melt adhesive needs to be heated to an even higher temperature after the melting.
  • the hot melt adhesive has the following property, i.e., the hot melt adhesive starts softening at about 100 degrees C., and demonstrates a sufficient bonding force at the temperature of 160-180 degrees C. The softening is confirmed by a measuring method defined in JISK-6863.
  • the user may keep pulling a trigger while the hot melt adhesive have a high viscosity.
  • the hot melt adhesive has a high viscosity when the hot melt adhesive starts softening. If the hot melt adhesive having a high viscosity is squeezed out, this would cause the clogging of a ball valve in a nozzle. If the user continues to pull the trigger from this situation in order to forcibly inject the melted adhesive, the melted adhesive flows backward inside and solidifies in a silicon sleeve at an entrance. If this happens, the trigger cannot move, and the glue gun may become beyond repair. In addition, the inside capacity of the conventional glue gun is small so that the conventional glue gun cannot inject the adhesive continuously. When the bonding work should continuously be carried out, two or more glue guns are prepared and used alternately. This is troublesome in industrial use.
  • the present invention is to provide a novel glue gun that can efficiently heat and melt the hot melt adhesive in a short time, and can inject the melted adhesive continuously.
  • a first aspect of the present invention provides a glue gun that includes a melt portion configured to receive a stick-shaped hot melt adhesive, and then heat, melt, and inject the hot melt adhesive.
  • the melt portion has an inlet opening to receive the stick-shaped hot melt adhesive, and an outlet opening to inject liquid hot melt adhesive.
  • the liquid hot melt adhesive is prepared by heating and melting the stick-shaped hot melt adhesive.
  • the inlet opening communicates with the outlet opening via a plurality of passages.
  • the stick-shaped hot melt adhesive is branched into a plurality of passages after the hot melt adhesive is introduced into the melt portion from the inlet opening. Then, the branched hot melt adhesive is moved toward the outlet opening. This increases the contact area between the hot melt adhesive and the base material of the melt portion. Therefore, it is possible to efficiently heat and melt the hot melt adhesive, raise the temperature of the hot melt adhesive to the bonding temperature in a short time, and continuously inject the hot melt adhesive.
  • the second aspect of the present invention is directed to the glue gun according to the first aspect, and further includes a cutting blade unit disposed at the inlet opening and configured to cut the hot melt adhesive radially, with an axis of the hot melt adhesive being the center of radial cutting.
  • the cutting blade unit can divide the stick-shaped hot melt adhesive into a plurality of pieces immediately after the hot melt adhesive is received in the melt portion. After the dividing, it is possible to efficiently heat and melt the resulting pieces of hot melt adhesive.
  • the third aspect of the present invention provides another glue gun that includes a melt portion configured to receive a stick-shaped hot melt adhesive, and then heat, melt, and inject the hot melt adhesive.
  • the melt portion has an inlet opening to receive the stick-shaped hot melt adhesive, and an outlet opening to inject liquid hot melt adhesive.
  • the liquid hot melt adhesive is prepared by heating and melting the stick-shaped hot melt adhesive.
  • a cutting blade unit is disposed in a first passage extending inward from the inlet opening. The cutting blade unit is configured to cut the hot melt adhesive radially, with an axis of the hot melt adhesive being the center of radial cutting.
  • a second passage having a conical shape is formed downstream of the first passage.
  • the second passage is configured to spread the hot melt adhesive radially from a center of the hot melt adhesive while guiding the hot melt adhesive to a downstream side.
  • Third passages extend from the second passage toward the outlet opening, and are arranged in a generally annular form. The third passages merge with each other near the outlet opening and communicate with the outlet opening.
  • This configuration increases the contact area between the hot melt adhesive and the base material of the melt portion.
  • This is similar to the first aspect of the invention. Therefore, it is possible to efficiently heat and melt the hot melt adhesive, raise the temperature of the hot melt adhesive to the bonding temperature in a short time, and continuously inject the hot melt adhesive.
  • the cutting blade unit can divide the stick-shaped hot melt adhesive into a plurality of pieces immediately after the hot melt adhesive is introduced to the melt portion. After the dividing, therefore, it is possible to efficiently heat and melt the resulting pieces of hot melt adhesive. This is similar to the second aspect of the invention.
  • the fourth aspect of the present invention is directed to the glue gun according to the third aspect, and the third passages have a larger volume on a downstream side than on an upstream side.
  • the fifth aspect of the present invention is directed to the glue gun according to the third aspect or the fourth aspect, and the third passages are separate in a circumferential direction of the generally annular form.
  • the contact area between the hot melt adhesive and the base material of the melt portion increases. Therefore, it is possible to efficiently heat and melt the hot melt adhesive, raise the temperature of the hot melt adhesive to the boding temperature in a short time, and inject the hot melt adhesive continuously. This is similar to the first and third aspects of the invention.
  • the sixth aspect of the present invention is directed to the glue gun according to the fifth aspect, and each of the third passages is circular in its cross-section. This configuration allows the hot melt adhesive to smoothly move through the third passages. It is also possible to easily prepare the third passages by plaster casting, extrusion, lost wax casting, or the like.
  • the seventh aspect of the present invention is directed to the glue gun according to any one of the third to sixth aspects, and the cutting blade unit includes a plurality of blades that extend from a wall of the first passage toward a center of the first passage. Each of the blades gradually increases its height from an upstream side of the first passage to a downstream side of the first passage. With this configuration, it is possible to smoothly cut the hot melt adhesive without receiving a large resistance.
  • the eighth aspect of the present invention is directed to the glue gun according to any one of the third to seventh aspects, and the glue gun further includes a plate heater that extends around a substantially entire outer surface of the melt portion. With this configuration, it is possible to uniformly heat the entire melt portion without irregularities.
  • the present invention has, for example, the following advantages: (1) The contact area between the hot melt adhesive and the base material of the melt portion increases. Therefore, it is possible to efficiently heat and melt the hot melt adhesive, raise the temperature of the hot melt adhesive to the bonding temperature in a short time, and continuously inject the hot melt adhesive. (2) The cutting blade unit can divide the stick-shaped hot melt adhesive into a plurality of pieces immediately after the hot melt adhesive is received in the melt portion. After the dividing, therefore, it is possible to efficiently heat and melt the resulting pieces of hot melt adhesive. (3) It is possible to hold a large amount of hot melt adhesive, which is heated, melted and has reached the bonding temperature, in the melt portion. Accordingly, it is possible to continuously inject the adhesive, and ensure efficient bonding work.
  • FIG. 1 shows an outside appearance of a glue gun 100 according to one embodiment of the present invention.
  • FIG. 2 is a vertical cross-sectional view of a melt portion 40 of the glue gun 100 according to the present invention.
  • FIG. 3 is a cross-sectional view taken along the line a-a in FIG. 2 .
  • FIG. 4 is an exploded view showing a structure of the melt portion 40 shown in FIG. 2 .
  • FIG. 5( b ) is a drawing when viewed in the b-direction in FIG. 4 .
  • FIG. 5( c ) is a drawing when viewed in the c-direction in FIG. 4 .
  • FIG. 5( d ) is a drawing when viewed in the d-direction in FIG. 4 .
  • FIG. 5( e ) is a drawing when viewed in the e-direction in FIG. 4 .
  • FIG. 6 ( 1 ) schematically illustrates a hot melt adhesive 50 immediately before the hot melt adhesive is introduced into the melt portion 40 .
  • FIG. 6 ( 2 ) schematically illustrates the hot melt adhesive 50 immediately after the hot melt adhesive is introduced into the melt portion 40 .
  • FIG. 6 ( 3 ) schematically illustrates the hot melt adhesive 50 that is cut by a cutting blade unit 80 d after the hot melt adhesive 50 is introduced into the melt portion 40 .
  • FIG. 7 ( 4 ) schematically illustrates the hot melt adhesive 50 that moves through a second passage having a conical shape.
  • FIG. 7 ( 5 ) schematically illustrates the hot melt adhesive 50 that moves from the second passage to a third passage.
  • FIG. 7 ( 6 ) schematically illustrates the hot melt adhesive 50 immediately before the hot melt adhesive merges at an end of the third passage.
  • FIG. 7 ( 7 ) schematically illustrates the hot melt adhesive 50 that is injected from an outlet opening 83 b.
  • FIG. 8 shows cross-sectional views ( 1 )-( 7 ) of the hot melt adhesive, which correspond to FIGS. 6 ( 1 ) to 6 ( 3 ) and 7 ( 4 ) to 7 ( 7 ) respectively.
  • FIGS. 9(A)-9(D) show a set of front views showing other embodiments with respect to the second passages 81 b of the melt portion 40 .
  • FIGS. 10(A)-10(F) show another set of front views showing other embodiments with respect to the second passages 81 b of the melt portion 40 .
  • FIG. 1 shows an outside appearance of a glue gun 100 according to an embodiment of the present invention.
  • the glue gun 100 has a generally cylindrical main body 10 , a handle 20 extending from the glue gun main body 10 , and a trigger 30 at a connection between the handle 20 and the glue gun main body 10 .
  • the overall shape (outside appearance) of the glue gun is similar to a handgun or pistol.
  • melt portion 40 In the glue gun main body 10 , there is a built-in melt portion 40 as shown in FIGS. 2 and 3 .
  • a stick-shaped hot melt adhesive (glue stick) 50 is introduced continuously into the melt portion 40 .
  • the melt portion 40 heats and melts the glue stick 50 , and injects the melted glue from a nozzle 60 at a front end of the melt portion 40 .
  • the melt portion 40 is made from a metal having a good thermal conductivity, such as aluminum, copper or steel, or a ceramics.
  • the melt portion 40 includes four blocks 80 , 81 , 82 and 83 which are joined (united) in the axial direction by elongated bolts (long screws) 70 .
  • the melt portion 40 has a generally cylindrical shape, as a whole.
  • a plate heater 90 surrounds the melt portion 40 . As the plate heater 90 generates heat, the entire melt portion 40 is uniformly heated from outside.
  • the plate heater 90 generates the heat upon receiving an electric current from a power source 20 a and a power source cable 20 b as shown in FIG. 1 .
  • the plate heater 90 is activated and deactivated upon turning on and off of a switch 20 c .
  • the temperature of the plate heater 90 is always measured by a temperature sensor 92 disposed in the vicinity of the plate heater 90 , as shown in FIG. 3 .
  • the temperature of the plate heater 90 is maintained in a predetermine range, for example, from 160 to 200 degrees C.
  • the predetermined range is set arbitrarily.
  • the first block 80 has a generally cylindrical shape. As shown in FIG. 4 , the first block 80 has an inlet opening 80 a in one end face thereof to receive the stick-shaped hot melt adhesive 50 .
  • the first block 80 has a tapered face 80 b in the other end face thereof, as shown in FIG. 5( d ).
  • the tapered face expands at a certain inclination.
  • the center portion of the tapered face 80 b communicates with the inlet opening 80 a via a first passage 80 c .
  • a cutting blade unit 80 d that has a cross shape.
  • holes, which are designated at 70 a are bolt holes through which the bolts 70 extend. In this embodiment, there are formed four bolts holes 70 a , 70 a , 70 a and 70 a.
  • the second block 81 has a cylindrical shape, which has the same diameter as the first block 80 . As shown in FIGS. 5( b ) and 5 ( c ), a conical projection 81 a is formed at the center portion in one end face of the second block 81 . A plurality of passages (eight passages in this embodiment) 81 b are formed around the conical projection 81 a . Each of the passages 81 b has a circular cross-section, and extends to the opposite end face of the second block. A hollow space 81 c is formed along the axial center of the second block 81 . The second block 81 also has four bolt holes 70 a , 70 a , 70 a and 70 a , through which the bolts 70 extend.
  • the third block 82 has a substantially similar shape to the second block 81 .
  • the direction is only different, i.e., the direction of the third block 82 is opposite the direction of the second block 81 .
  • the third block 82 is joined (united) to the second block 81 .
  • the fourth block 83 has a cylindrical shape with the same diameter as the first block 80 , the second block 81 , and the third block 82 , as shown in FIG. 5( e ).
  • a conical tapered face 83 a is formed at the center portion in one end face of the fourth block 83 .
  • the opposite end face of the fourth block 83 has an outlet opening 83 b .
  • the outlet opening 83 b protrudes from this end face.
  • the outlet opening 83 b communicates with the center portion of the tapered face 83 a via a passage 83 c.
  • a thread groove 83 d is formed in the wall surface of the passage 83 c , which communicates with the outlet opening 83 b .
  • the metallic nozzle 60 is screwed into the outlet opening 83 b .
  • the metallic nozzle 60 can be unscrewed.
  • the tapered face 83 a has the same shape and size as the tapered face 80 b of the first block 80
  • the tapered face 83 a is formed at a position several mm—several cm deep inside from the end face of the fourth block 83 , as illustrated.
  • the fourth block 83 also has four bolt holes 70 a , 70 a , 70 a and 70 a , through which the bolts 70 extend.
  • the switch 20 c of the plate heater 90 is turned on to bring the melt portion 40 into the heating condition.
  • the stick-shaped hot melt adhesive 50 is loaded into the glue gun main body 10 , as shown in FIG. 1 .
  • the trigger 30 is pulled, and the hot melt adhesive 50 is pushed into the melt portion 40 .
  • the hot melt adhesive 50 is received into the inlet opening 80 a of the melt portion 40 from the front end of the hot melt adhesive 50 , and moves in the passage (first passage) 80 c toward the outlet opening 83 b .
  • the cross-sectional shape of the hot melt adhesive 50 does not change very much, i.e., the cross-sectional shape is an original shape (circle).
  • the hot melt adhesive 50 is further pushed in as the trigger 30 is further pulled from the condition shown in FIG. 6 ( 2 ). Then, as shown in FIGS. 6 ( 3 ) and 8 ( 3 ), the cutting blade unit 80 d intrudes into the hot melt adhesive 50 from the outer surface of the hot melt adhesive 50 .
  • the cutting blade unit 80 d cuts the hot melt adhesive 50 in the cross shape in the axial direction, and divides the hot melt adhesive 50 into a plurality of pieces.
  • the pieces of hot melt adhesive 50 spread radially and move in the conical passage (second passage) defined between the tapered face 80 b of the first block 80 and the conical projection 81 a of the second block 81 , as shown in FIGS. 7 ( 4 ) and 8 ( 4 ).
  • the hot melt adhesive 50 is heated immediately after the hot melt adhesive 50 is received in the melt portion 40 from the inlet opening 80 a .
  • the hot melt adhesive 50 is considerably softened before the hot melt adhesive 50 arrives at the second passage. Accordingly, the hot melt adhesive 50 moves through the conical passage (second passage) in a relatively smooth manner.
  • the hot melt adhesive 50 branches and flows in the respective passages (third passages) 81 b , 81 b , . . . , from the conical passage (second passage), as shown in FIGS. 7 ( 5 ), 7 ( 6 ), 8 ( 5 ) and 8 ( 6 ).
  • the hot melt adhesive 50 flows in the third passages toward the outlet opening 83 b .
  • the hot melt adhesive 50 is further heated by the heat from the heater 90 .
  • the temperature of the hot melt adhesive 50 rises to a value that can demonstrate a sufficient bonding force when the hot melt adhesive 50 approaches the exits of the respective passages (third passages) 81 b , 81 b, . . . .
  • the hot melt adhesive 50 is already heated sufficiently.
  • the hot melt adhesive 50 does not clog at the nozzle 60 , and therefore the hot melt adhesive 50 can sufficiently demonstrate the bonding force, which the hot melt adhesive possesses inherently.
  • the hot melt adhesive is injected in an amount that is decided by the nozzle diameter.
  • the glue gun 100 of the present invention includes a plurality of passages 81 b , 81 b , . . . that connects the inlet opening 80 a of the melt portion 40 to the outlet opening 83 b of the melt portion 40 .
  • the contact area (heating area) between the hot melt adhesive 50 and the base material (metal having a high thermal conductivity) of the melt portion 40 is increased. It is, therefore, possible to efficiently heat and melt the hot melt adhesive 50 , raise the hot melt adhesive temperature to the bonding temperature in a short time, and inject the hot melt adhesive continuously. This prevents the hot melt adhesive 50 , which is not sufficiently softened yet, from clogging at or in the vicinity of the nozzle 60 . This ensures good bonding work.
  • the hot melt adhesive is divided into a plurality of pieces by the cutting blade unit 80 d having the cross shape in the illustrated embodiment
  • the number of the blades 80 e of the cutting blade unit 80 d is not limited to four, i.e., the number of the blades 80 e may be greater than four or smaller than four.
  • the configuration of the branching passages (second passages) 81 b is not limited to that shown in FIGS. 5( b ) and 5 ( c ).
  • a plurality of large and small passages (second passage) 81 b may be provided.
  • the cross-sectional shape of each of the second passages 81 b is not limited to the circle.
  • the cross-section of the second passage 81 b may have a fan shape (rectangular shape).
  • the passages (second passages) 81 b may also be provided near the center of the melt portion 40 .
  • each second passage 81 b may have a polygonal shape (hexagon in the drawing).
  • the cross-section of the second passages 81 b may have other shapes, such as a lattice shape, a honeycomb shape, or an oval shape.
  • the melt portion 40 has the four blocks 80 , 81 , 82 and 83 .
  • the number of the blocks is not limited to four.
  • the number of the blocks may be more than four or less than four.
  • the melt portion 40 has the hollow portion 81 c along the center axis thereof.
  • a separate heater may be disposed in the hollow portion 81 c to heat the hot melt adhesive from the center axis of the melt portion.
  • the hollow portion 81 c may be dispensed with.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Ink Jet (AREA)
US14/687,818 2013-09-17 2015-04-15 Glue gun Abandoned US20150209820A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2013191465 2013-09-17
JP2013-191465 2013-09-17
PCT/JP2014/074192 WO2015041164A1 (ja) 2013-09-17 2014-09-12 グルーガン

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/074192 Continuation WO2015041164A1 (ja) 2013-09-17 2014-09-12 グルーガン

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US20150209820A1 true US20150209820A1 (en) 2015-07-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
US14/687,818 Abandoned US20150209820A1 (en) 2013-09-17 2015-04-15 Glue gun

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US (1) US20150209820A1 (cs)
EP (1) EP2898957A4 (cs)
JP (1) JP6324394B2 (cs)
KR (1) KR20160057347A (cs)
CN (1) CN104437986A (cs)
TW (1) TW201511846A (cs)
WO (1) WO2015041164A1 (cs)

Cited By (15)

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US20170341849A1 (en) * 2016-05-27 2017-11-30 S.C. Johnson & Son, Inc. Plastic bottle and base cup for a pressurized dispensing system
US9908139B2 (en) * 2015-11-09 2018-03-06 Chia-Wen Hsu Timed glue gun
USD817394S1 (en) 2016-12-13 2018-05-08 Acme United Corporation Glue pen
USD845096S1 (en) 2017-02-17 2019-04-09 Acme United Corporation Glue gun
US10369590B2 (en) 2016-03-10 2019-08-06 Acme United Corporation Glue gun
US10406554B2 (en) 2016-04-01 2019-09-10 Acme United Corporation Glue pen
US10486186B2 (en) * 2018-03-14 2019-11-26 Adhesive Technologies, Inc. No-drip hot melt glue gun
USD877583S1 (en) * 2018-08-27 2020-03-10 Shenzhen Qianhai Value Online Ecommerce Co., Ltd. Glue gun
USD879568S1 (en) * 2018-08-27 2020-03-31 Shenzhen Qianhai Value Online Ecommerce Co., Ltd. Glue gun
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CN113894008A (zh) * 2021-06-18 2022-01-07 杭州金星通光纤科技有限公司 替代光纤生产中10kg涂料桶的集中供料设备
EP4140599A1 (de) * 2021-08-25 2023-03-01 HOLZ-HER GmbH Kleberschmelzvorrichtung für eine kantenanleimmaschine
EP4140598A1 (de) * 2021-08-25 2023-03-01 HOLZ-HER GmbH Kleberschmelzvorrichtung für eine kantenanleimmaschine
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CN113894008A (zh) * 2021-06-18 2022-01-07 杭州金星通光纤科技有限公司 替代光纤生产中10kg涂料桶的集中供料设备
EP4140599A1 (de) * 2021-08-25 2023-03-01 HOLZ-HER GmbH Kleberschmelzvorrichtung für eine kantenanleimmaschine
EP4140598A1 (de) * 2021-08-25 2023-03-01 HOLZ-HER GmbH Kleberschmelzvorrichtung für eine kantenanleimmaschine
USD998434S1 (en) * 2021-12-02 2023-09-12 Adhesive Technologies, Inc. Thumb feed glue gun
US20240359207A1 (en) * 2023-04-28 2024-10-31 Guangxiang Zhuang Hot Melt Gun
US12208414B2 (en) * 2023-04-28 2025-01-28 Guangxiang Zhuang Hot melt gun

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EP2898957A4 (en) 2016-10-12
KR20160057347A (ko) 2016-05-23
WO2015041164A1 (ja) 2015-03-26
TW201511846A (zh) 2015-04-01
TWI561314B (cs) 2016-12-11
CN104437986A (zh) 2015-03-25
EP2898957A1 (en) 2015-07-29
JP6324394B2 (ja) 2018-05-16

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